Ingestion of gelatinized potato starch containing a high level of phosphorus decreases serum and liver lipids in rats
| Autor: | Mariko Atsumi, Takahiro Noda, Naomichi Nishimura, Hitoshi Mineo, Hideyuki Chiji, Michihiro Fukushima, Takumi Kanazawa |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Male
food.ingredient Starch General Chemical Engineering Phosphates Bile Acids and Salts Rats Sprague-Dawley chemistry.chemical_compound food Animals Food science Amylase Resistant starch Potato starch Triglycerides Solanum tuberosum chemistry.chemical_classification Triglyceride biology Chemistry food and beverages Fatty acid Phosphorus General Medicine General Chemistry Animal Feed Lipids Diet Rats Cholesterol Liver Amylopectin biology.protein Digestion |
| Zdroj: | Journal of oleo science. 57(6) |
| ISSN: | 1347-3352 |
| Popis: | Potato starch is known to have a higher concentration of phosphate than other starches. The presence of phosphate groups in amylopectin results in resistance to digestion by amylase. Therefore, there is a possibility that potato starch is slowly digested, inducing a physiological effect similar to that of resistant starch and indigestible oligosaccharides. The amount of phosphate group in starch differs with potato cultivar. In the present study, we investigated the effects of gelatinized potato starch containing a high level of phosphorus on lipid metabolism in rats. For this purpose, we determined lipid levels in the serum and liver in rats fed two kinds of gelatinized potato starches with different phosphorus contents. Four groups of male Sprague-Dawley rats were fed a 60% sucrose diet (control) or one of three diets containing cornstarch (CS), Benimaru (BM) potato starch or Hokkaikogane (HK) potato starch. Fat pad weight was slightly decreased in the HK diet group compared with that in the other groups. Free fatty acids in serum were significantly lowered by dietary HK starch compared with control, and serum triglyceride in rats fed the HK diet was also decreased. In the BM and HK diet groups, triglyceride levels in the liver were decreased compared with that in the control and CS groups. As for hepatic total cholesterol level, there were no significant differences among three starch diet groups. Fecal bile acid excretion was greater in the two potato starch groups than in the control group. On the other hand, there were no significant differences in cecal short-chain fatty acid content or pH. Thus, we conclude that dietary gelatinized potato starch reduces free fatty acid and triglyceride in serum and hepatic triglyceride, but does not affect cecal fermentation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|